This page contains supplementary info, which doesn't appear in any of the games.
Serenity has reddish-brown shoulder-length hair with a green eye; her left eye is missing due to her Taint. She has a scar over her left eye. She has fair skin. Her default attire in Lunar Shadow consists of a sapphire blue shirt with a right sleeve, and no left sleeve; a dark sky blue knee-length skirt, lavender tights and gold-colored Mary-Jane shoes. She covers her left hand with a dark blue elbow-length glove.
After the events of Lunar Shadow, she wears a white medical eyepatch.
Serenity is a kind hearted young girl who has the courage to fight the Castle Master's various minions.
- Serenity remained in Yes Town while her father, Evan O'Neill, tried to rescue her mother, Valkyrie Horton, from the Castle Master, Aidan Flamberge. She only appears in the game as an NPC.
- Serenity went to the castle, armed with only Invidia. She would go on to take down the Castle Master and his minons, ending his tyrannical reign over Tirahnys.
- In an alternate timeline, Serenity Horton is killed on 20/12/2022 and is resurrected by the Curse of the Castle Masters as Shadow Serenity. As her undead self, she decides to take her revenge on Selena Daria, blaming her for Serenity's demise.
- Her appearance in Solar Shadow 2 is also non-canon. In that game, she appears as a boss in the Magic School. She doesn't wish to attack Selena Daria van der Merwe, but is under mind control. She uses Acidic Bubble, Crescent Moon, Arcanum and Misery's End.
- Serenity is unable to see Life Capsules; this is ignored for gameplay reasons if the player doesn't choose 3-HP Mode which is confirmed as the canon path.
- There are 5 clones of her but only 2 of them are alive during the main story; Serenity and Ataraxis share the same default outfit because the latter is a clone.
- Out of all the Mimigas in Cave Story, King is her favourite. This is shown in Lunar Shadow v0.4's ending where her father takes on the form of King when she's trapped in the ending before returning to life.
- The medical eyepatch she wears after Lunar Shadow can be obtained in Lunar Shadow itself, in a treasure chest hidden in the Entrance.
- It was confirmed by Cibryll (as "Kim") that Serenity is ambidextrous, it is unknown if her clones share this trait.
|Characters (Lunar Shadow)|
|Aidan Flamberge • Alexis Flamberge • Aqua • Azehr • Aziza • Cheriza du Blaze • Eron Araia Armweak • Evan O'Neill • Grialdyn • Hiranya Mitsuru • Ignis du Blaze • Ilina Horton • Invidia • Irving • Ladislaw Smit • Lunadine Crimstaine • Micren • Noxakaisink • Selena Daria van der Merwe • Serenity Clones • Serenity Horton • Shiki Tashiki • Shinica Horton • Shiori Shauntal • Sycor • Terra • Tia and Mat • Valerie Horton • Valkyrie Horton • Xydia Horton • Xyz|
|Lore: Family Tree• Taint of the Hortons • The Taint